CN110718959B - Standby power supply system - Google Patents
Standby power supply system Download PDFInfo
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- CN110718959B CN110718959B CN201810772411.0A CN201810772411A CN110718959B CN 110718959 B CN110718959 B CN 110718959B CN 201810772411 A CN201810772411 A CN 201810772411A CN 110718959 B CN110718959 B CN 110718959B
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- 238000007600 charging Methods 0.000 claims abstract description 77
- 230000005611 electricity Effects 0.000 claims abstract description 28
- 239000003990 capacitor Substances 0.000 claims abstract description 25
- 238000010277 constant-current charging Methods 0.000 claims abstract description 12
- 230000002159 abnormal effect Effects 0.000 claims abstract description 11
- 239000000758 substrate Substances 0.000 claims description 3
- 238000013500 data storage Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
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- 238000001514 detection method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/30—Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering using capacitors as storage or buffering devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Theoretical Computer Science (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Dc-Dc Converters (AREA)
Abstract
The application discloses stand-by power supply system includes: the input end of the charging module is connected with a working power supply of the storage equipment, and the output end of the charging module is connected with the electricity storage module; the input end of the boosting module is connected with the electricity storage module, and the output end of the boosting module is connected with the uploading communication module; the control module is used for providing enabling signals for the charging module and the boosting module according to the state of the working power supply required by data storage, when the working power supply is normal, the control module provides the charging enabling signals for the charging module, and the charging module performs constant-current charging on the battery or the super capacitor; when the working power supply is abnormal, the control module provides a boosting enabling signal for the boosting module, and the boosting module boosts the output voltage of the electricity storage module and supplies power to the communication module.
Description
Technical Field
The invention relates to the technical field of circuit design, in particular to a standby power supply system.
Background
The storage device is widely applied to various electronic products and electronic service systems, and for some storage devices with special application scenes, the provision of a standby power supply system for a hard disk is an important means for ensuring the integrity of hard disk data in the storage device.
Taking a storage device applied to a search server as an example, in order to ensure that the storage device stores unsaved data after the system is powered down unexpectedly, a standby power supply system needs to be provided for the storage device, so that a working power supply for storing data is provided for the storage device by virtue of the standby power supply system after the external power supply of the system is stopped.
Hard disk stand-by power supply system among the prior art mainly relies on super capacitor or reserve battery to provide working power supply for storage device through the module that steps up after the external power supply of system stops, and concrete structure is shown as figure 1, includes: a charging module 110, a boosting module 120 and a super capacitor Csc. When external power exists, the external power supplies charge the super capacitor Csc through the charging module 110; after the external device stops supplying power, the super capacitor Csc supplies power to the external device, and because the output voltage of the super capacitor Csc is low, the prior art generally adopts the boost module 120 to boost the output voltage of the super capacitor Csc to 5V or 12V required by the external device. The charging module 110 in the prior art is usually implemented by a Low Dropout Regulator (LDO), and only plays a role of overvoltage protection for preventing overcharge in the charging process, and cannot manage and control the charging process, thereby implementing constant current charging.
Therefore, it is necessary to improve the hard disk standby power supply system in the prior art to manage and control the charging process and realize constant current charging.
Disclosure of Invention
In view of this, an object of the present invention is to provide a backup power system to realize the management and control of the charging process and realize the constant current charging.
According to the present invention, there is provided a backup power supply system including: the input end of the charging module is connected with the working power supply, and the output end of the charging module is connected with the electricity storage module; the boosting module is connected with the electricity storage module; the control module is used for providing enabling signals for the charging module and the boosting module according to the state of the working power supply, when the working power supply is normal, the control module provides the charging enabling signals for the charging module, and the charging module performs constant-current charging on the electricity storage module; when the working power supply is abnormal, the control module provides a boosting enabling signal for the boosting module, and the boosting module boosts the output voltage of the electricity storage module and then outputs the boosted output voltage.
Preferably, the power storage module is a super capacitor.
Preferably, the charging module includes: the control end of the constant current control unit is used for receiving the charging enabling signal; and the first switch tube is connected between the working power supply and the input end of the electricity storage module in series, wherein the output end of the constant current control unit is connected with the control end of the first switch tube and is used for performing constant current charging on the electricity storage module.
Preferably, the control module comprises: the input end of the enabling unit receives an enabling signal, and the first output end of the enabling unit is connected with the boosting module to provide the boosting enabling signal; and the input end of the phase inverter is connected with the second output end of the enabling unit, and the output end of the phase inverter is connected with the charging module to provide the charging enabling signal.
Preferably, the boosting module includes: the boost circuit comprises a switch control circuit and a boost circuit, wherein the input end of the switch control circuit receives the boost enabling signal, the output end of the switch control circuit is connected with the boost circuit to provide a switch control signal, and the input end of the boost circuit is connected with the electricity storage module and used for boosting the output voltage of the electricity storage module according to the switch control signal.
Preferably, the booster circuit includes: the switch control circuit comprises a second switch tube, an inductor, a first diode and a capacitor, wherein a control end of the second switch tube receives a switch control signal, a first pass end is connected with the inductor and an intermediate node of the first diode, a first end of the inductor is connected with an output end of the power storage module, a second end is connected with a positive electrode of the first diode, a first end of the capacitor is connected with a negative electrode of the first diode, a second end of the capacitor is grounded, and a negative electrode of the first diode and the intermediate node of the capacitor are connected with an output end of the boosting module.
Preferably, the boost module further comprises a protection circuit, an input end of the protection circuit is connected with an output end of the boost circuit, and an output end of the protection circuit is connected with the switch control circuit and used for performing overcurrent protection on the boost circuit.
Preferably, the protection circuit includes: the circuit comprises an operational amplifier and a first resistor, wherein a positive phase input end and a negative phase input end of the operational amplifier are respectively connected with two ends of the first resistor, and an output end of the operational amplifier is connected with the switch control circuit.
Preferably, the backup power supply system further includes: the feedback circuit comprises a second resistor and a third resistor which are connected between the output end of the boosting module and the ground in series, and a feedback signal is provided by an intermediate node of the second resistor and the third resistor.
Preferably, the backup power supply system further includes: and the bias circuit is used for obtaining bias voltage according to the working power supply.
Preferably, the constant current control unit includes: and the positive phase input end of the first comparator receives the voltages at the two ends of the electricity storage module, the negative phase input end of the first comparator receives the bias voltage, the output end of the first comparator is connected with the substrate of the first switch tube, and the first comparator is used for comparing the voltages at the two ends of the electricity storage module with the bias voltage and switching on or switching off the first switch tube according to the comparison result.
Preferably, the bias circuit includes a second diode and a fourth resistor, an anode of the second diode is connected to the operating power supply, and a cathode of the second diode is connected to the fourth resistor to obtain the bias voltage.
Preferably, the bias circuit further comprises: and the anode of the third diode is connected with the output end of the boosting module, and the cathode of the third diode is connected with the fourth switching tube.
Preferably, the constant current control unit further includes: the power storage module comprises a second comparator and a logic control module, wherein a positive phase input end of the second comparator receives voltages at two ends of the power storage module, a negative phase input end of the second comparator receives a reference voltage, an output end of the second comparator is connected with the logic control module to provide a comparison result, and the logic control module is used for controlling the on-resistance of the first switching tube according to the received comparison result.
Preferably, the backup power supply system further includes: and the standby power supply module is used for supplying power to the power storage module and the storage equipment when the working power supply is abnormal.
According to the standby power supply system provided by the invention, when the working power supply is normal, the control module provides a charging enabling signal to the charging module, and the charging module performs constant-current charging on the electricity storage module; when the working power supply is abnormal, the control module provides a boosting enabling signal for the boosting module, and the boosting module boosts the output voltage of the electricity storage module and outputs the boosted output voltage to the hard disk.
In a preferred embodiment, the charging module compares the voltage across the power storage module with a bias voltage and charges the power storage module when the voltage across the power storage module is less than the bias voltage. In some embodiments, the charging module further includes a constant current control unit, which compares the voltages at the two ends of the power storage module with a reference voltage, and adjusts the on-resistance of the switching tube on the charging path according to the comparison result, so as to realize constant current control of the charging process.
In a preferred embodiment, the backup power supply system further comprises a backup power supply module, for example, a power battery module, for supplying power to the power storage module and the storage device when the working power supply is abnormal.
In other embodiments of the present invention, the charging module, the control module and the boosting module are integrated into one chip, so as to reduce the occupied area of the circuit; meanwhile, the switching between the charging module and the boosting module is realized in the chip without peripheral logic control, so that additional circuits are reduced, and the cost is reduced.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 shows a schematic structural diagram of a hard disk standby power supply system according to the prior art.
Fig. 2 is a schematic structural diagram of a standby power supply system according to a first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a standby power supply system according to a second embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a charging module according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a chip structure of the standby power management circuit according to the present invention.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by like reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale. Moreover, certain well-known elements may not be shown in the figures.
In the following description, numerous specific details of the invention, such as structure, materials, dimensions, processing techniques and techniques of components, are set forth in order to provide a more thorough understanding of the invention. However, as will be understood by those skilled in the art, the present invention may be practiced without these specific details.
It should be understood that in the following description, a "circuit" refers to a conductive loop formed by at least one element or sub-circuit through an electrical or electromagnetic connection. When an element or circuit is referred to as being "connected to" another element or element/circuit is referred to as being "connected between" two nodes, it may be directly coupled or connected to the other element or intervening elements may be present, and the connection between the elements may be physical, logical, or a combination thereof. In contrast, when an element is referred to as being "directly coupled" or "directly connected" to another element, it is intended that there are no intervening elements present.
Fig. 2 is a schematic structural diagram of a standby power supply system according to a first embodiment of the present invention. The invention provides a standby power supply system which is applied to storage equipment, wherein the storage equipment comprises a hard disk. The backup power system includes a storage module 260, a charging module 210, a control module 220, a boosting module 230, a feedback circuit 240, and a bias circuit 250.
The input end of the control module 220 receives the enable signal EN, the first output end is connected with the control end of the charging module 210 to provide the charging enable signal EN-Chg to the charging module 210, and the second output end is connected with the control end of the boosting module 230 to provide the boosting enable signal On-Boost to the boosting module 230.
The charging module 210 and the bias circuit 250 are connected in series between the operating power Vin and the power storage module 260. The bias circuit 250 is used for obtaining a bias voltage Vbias according to an input working power Vin. The charging module 210 is configured to compare a first voltage Vcap at two ends of the power storage module 260 with the bias voltage Vbias after receiving the charging enable signal En-Chg, and when the first voltage Vcap is less than the bias voltage Vbias, the charging module 210 charges the power storage module 260; when the first voltage Vcap is greater than the bias voltage Vbias, charging of the power storage module 260 is stopped.
The boosting module 230 is configured to Boost the output voltage of the power storage module 260 and output the boosted output voltage to the hard disk after receiving the boosting enable signal On-Boost.
The feedback circuit 240 is connected in series between the output terminal of the boost module 230 and ground, and is configured to obtain a feedback signal according to the output of the boost module 230.
The electricity storage module 260 can adopt a small-volume capacitor such as an ion capacitor, a super capacitor or a special-shaped super capacitor, so that the volume of the standby power supply system can be reduced. The specific type of the power storage module 260 is not limited in the present application, and those skilled in the art can select the type of the power storage module 260 according to the specific situation.
In the present embodiment, the operation modes of the charging module 210 and the boosting module 230 are automatically switched by the internal logic of the backup power system. When the circuit is operating normally, the power storage module 260 is charged by the charging module 210. When the working power supply is abnormal and the output voltage drops to 90%, the boosting module 230 is automatically started to boost the output voltage of the power storage module 260, and then power is supplied to the hard disk of the storage device, so that the hard disk completes the storage of unsaved data after the power is unexpectedly cut off, and the data loss is avoided.
It should be noted that the enable signal EN is an instruction sent to the control module 220 by the detection circuit of the storage device through detecting the working state of the working power supply.
In one embodiment of the present invention, when the operating power supply normally operates, the enable signal EN is at a first level (e.g., 0-0.4V), and the control module 220 provides the charge enable signal EN-Chg to the charge module 210. When the working power supply works abnormally, the enable signal EN is at a second level (e.g., >2.4V), and the control module 220 provides the Boost enable signal On-Boost to the Boost module 230.
In a preferred embodiment, the backup power system further includes a power battery, and the power battery is used for charging the power storage module 260 when the external power supply is stopped, so in this embodiment, when the external power supply is stopped, the enable signal EN is at a third level (for example, 0.8 to 1.8V), and the control module 220 provides the charge enable signal EN-Chg to the charging module 210, and the power battery supplies power to the storage device and the power storage module 260.
In another embodiment of the present application, an end of the power storage module 260 facing away from the charging module 210 is grounded.
In other embodiments of the present application, the end of the power storage module 260 facing away from the charging module 210 may also receive other fixed potentials, such as 1V, -1V, etc. The present application is not limited to this, and the details are determined according to actual situations.
Based on the above embodiments, in a specific embodiment of the present application, as shown in fig. 2, the charging module 210 includes a switch T1 and a constant current control unit 212, a first input terminal of the constant current control unit 212 is connected to a first output terminal of the control module 220 to receive the charging enable signal En-Chg, a second input terminal is connected to a first path terminal of the switch T1, and an output terminal is connected to a control terminal of the switch T1. The first path terminal of the switch tube T1 is connected to the output terminal of the bias circuit 250, and the second path terminal is connected to one terminal of the power storage module 260. The constant current control unit 212 is used for realizing constant current charging of the power storage module 260.
The control module 220 includes an enable unit 221 and an inverter N1, wherein an input terminal of the enable unit 221 receives an enable signal EN, a first output terminal is connected to the voltage Boost module 230 for providing a voltage Boost enable signal On-Boost, and a second output terminal is connected to an input terminal of the inverter N1. The output of the inverter N1 is connected to the charging block 210 for providing the charge enable signal En-Chg.
The bias circuit 250 comprises a diode D2, a diode D3 and a resistor R3, wherein the anode of the diode D2 is connected to the receiving terminal of the working power Vin, the cathode of the diode D2 is connected to the cathode of the diode D3, and the anode of the diode D3 is connected to the output terminal of the boost module 230. The resistor R3 has one end connected to the intermediate node of the diode D2 and the diode D3, and a second end for providing the bias voltage Vbias. The bias circuit 250 is used in the preferred embodiment to derive the bias voltage Vbias from the operating power Vin and the output voltage of the boost module 230.
The boosting module 230 includes a switch control circuit 231, a boosting circuit 232, and a protection circuit 233.
The switch control circuit 231 may be implemented by a PWM (Pulse Width Modulation) circuit, an input end of which receives the Boost enable signal On-Boost, and an output end of which is connected to the Boost circuit 232 and is configured to provide the switch control signal SW-On to the Boost circuit 232.
The boost circuit 232 comprises a switching tube T2, an inductor L1, a diode D1 and a capacitor C1, wherein the switching tube T2, the inductor L1, the diode D1 and the capacitor C1 form a boost circuit. The control end of the switch tube T2 receives the switch control signal SW-On, the first path end is connected to the intermediate node of the inductor L1 and the diode D1, and the second path end is connected to the protection circuit 233. The first end of the inductor L1 is connected to the output end of the power storage module 260, the second end is connected to the anode of the diode D1, and the cathode of the diode D1 is connected to the output end Vout of the standby power system, so as to supply power to the hard disk of the storage device through the output end Vout. The capacitor C1 has a first terminal connected to the cathode of the diode D1 and a second terminal connected to ground.
The protection circuit 233 includes an operational amplifier U1 and a resistor R4, wherein a first terminal of the resistor R4 is connected to the second path terminal of the switch transistor T2, and a second terminal thereof is grounded. The non-inverting input terminal and the inverting input terminal of the operational amplifier U1 are connected to both ends of the resistor R4, respectively, and the output terminal is connected to the switch control circuit 231. The protection circuit 233 is used for performing short-circuit protection and overcurrent protection on the boost circuit 230 by collecting the maximum output current of the boost circuit 232.
The feedback circuit 240 includes a resistor R1 and a resistor R2 connected in series between the output terminal of the boost module 230 and ground, and an intermediate node of the resistor R1 and the resistor R2 is used for providing a feedback signal to the switch control circuit 231.
Fig. 3 shows a schematic structural diagram of a backup power supply system according to a second embodiment of the present invention, as shown in fig. 3, in a preferred embodiment, the backup power supply system further includes a backup power supply module 270, where the backup power supply module 270 is, for example, a power battery module, and the backup power supply module 270 is used for supplying power to the power storage module 260 and the storage device when the working power supply is abnormal.
Fig. 4 is a schematic structural diagram of a charging module according to an embodiment of the present invention. As shown in fig. 4, the charging module 210 includes a switching tube T1 and a constant current control unit 212.
The constant current control unit 212 includes a comparator U2, a comparator U3, and a logic control module 2121, wherein an inverting input terminal of the comparator U2 is connected to the first path terminal of the switch transistor T1 for receiving the bias voltage Vbias, a non-inverting input terminal of the comparator U2 is connected to the second path terminal of the switch transistor T1 for receiving the first voltage Vcap, and an output terminal of the comparator U8926 is connected to the substrate of the switch transistor T1. When the first voltage Vcap is less than the bias voltage Vbias, the switching tube T1 is turned on; when the first voltage Vcap is greater than the bias voltage Vbias, the switching tube T1 is turned off.
The comparator U3 has a non-inverting input receiving the first voltage Vcap, an inverting input receiving the reference voltage Vpre, and an output connected to the logic control block 2121. The logic control module 2121 is configured to adjust an on-resistance of the switching tube T1 according to a comparison result of the comparator U3, so as to implement constant current control on a charging process.
Fig. 5 is a schematic diagram of a chip structure of the standby power management circuit according to the present invention. As shown in fig. 5, in the preferred embodiment of the present invention, the charging module 210, the control module 220, and the boosting module 230 are integrated into one chip to form a standby power management circuit. The standby power management circuit further comprises a BIAS voltage pin BIAS, a capacitance voltage pin CAP, an enable pin EN, a switch pin SW, a feedback pin FB and a ground pin GND. The charging module 210 is connected to the BIAS voltage pin BIAS and the capacitor voltage pin CAP, the control module 220 is connected to the enable pin EN, and the boosting module 230 is connected to the switch pin SW, the feedback pin FB, and the ground pin GND.
The power management circuit integrates the charging module 210, the control module 220 and the boosting module 230 into one chip, so that the occupied area of the circuit is reduced; meanwhile, the switching between the charging module 210 and the boosting module 230 is realized in the chip, and peripheral logic control is not needed, so that additional circuits are reduced, and the cost is lower.
In summary, in the backup power system provided by the present invention, the operation modes of the charging module 210 and the boosting module 230 are controlled by the internal logic of the backup power system, and no additional processor or enable signal is required. When the working power supply is normal, the control module 220 provides a charging enable signal to the charging module 210, and the charging module 210 performs constant-current charging on the power storage module 260; when the working power supply is abnormal, the control module 220 provides a boost enable signal to the boost module 230, and the boost module 230 boosts the output voltage of the power storage module 260.
In a preferred embodiment, the charging module 210 compares the voltage across the power storage module 260 to a bias voltage and charges the power storage module 260 when the voltage across the power storage module 260 is less than the bias voltage. In some embodiments, the charging module 210 further includes a constant current control unit, which compares the voltage across the power storage module 260 with a reference voltage, and adjusts the on-resistance of the switching tube on the charging path according to the comparison result, so as to implement constant current control of the charging process.
In a preferred embodiment, the backup power system further includes a backup power module 270, and the backup power module 270 is, for example, a power battery module, and is used for supplying power to the power storage module 260 and the storage device when the working power supply is abnormal.
In other embodiments of the present invention, the charging module 210, the control module 220, and the boosting module 230 are integrated into one chip, so as to reduce the occupied area of the circuit; meanwhile, the switching between the charging module 210 and the boosting module 230 is realized in the internal logic of the chip, and a peripheral processor or logic control is not needed, so that additional circuits are reduced, and the cost is reduced.
It should be noted that, in the above embodiment, the backup power supply system provided by the present invention is described by taking the storage device as an example, but the present invention is not limited thereto, and the backup power supply system provided by the present invention may also be used in other electronic devices.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
While embodiments in accordance with the invention have been described above, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (13)
1. A backup power supply system comprising:
the input end of the charging module is connected with the working power supply, and the output end of the charging module is connected with the electricity storage module;
the boosting module is connected with the electricity storage module; and
a control module for providing enable signals to the charging module and the boosting module according to the state of the working power supply,
when the working power supply is normal, the control module provides a charging enabling signal to the charging module, and the charging module performs constant-current charging on the electricity storage module;
when the working power supply is abnormal, the control module provides a boosting enabling signal to the boosting module, the boosting module boosts the output voltage of the electricity storage module and then outputs the boosted output voltage,
the charging module includes:
a constant current control unit including a first comparator; and
the first switching tube is connected in series between the working power supply and the input end of the power storage module,
wherein a positive phase input end of the first comparator receives the voltage at two ends of the electricity storage module, a negative phase input end of the first comparator receives the bias voltage, an output end of the first comparator is connected with the substrate of the first switch tube,
the first comparator is used for comparing the voltage at two ends of the electricity storage module with the bias voltage, and conducting or switching off the first switch tube according to the comparison result to perform constant current charging on the electricity storage module.
2. The backup power supply system according to claim 1, wherein the power storage module is a super capacitor.
3. The backup power supply system of claim 1, wherein the control module comprises:
the input end of the enabling unit receives an enabling signal, and the first output end of the enabling unit is connected with the boosting module to provide the boosting enabling signal;
and the input end of the phase inverter is connected with the second output end of the enabling unit, and the output end of the phase inverter is connected with the charging module to provide the charging enabling signal.
4. The backup power supply system of claim 1, wherein the boost module comprises: a switch control circuit and a boost circuit, wherein,
the input end of the switch control circuit receives the boosting enabling signal, the output end of the switch control circuit is connected with the boosting circuit to provide a switch control signal,
the input end of the booster circuit is connected with the electricity storage module and used for boosting the output voltage of the electricity storage module according to the switch control signal.
5. The backup power supply system according to claim 4, wherein the boost circuit includes: a second switch tube, an inductor, a first diode and a capacitor, wherein,
the control end of the second switch tube receives the switch control signal, the first path end is connected with the middle node of the inductor and the first diode,
the first end of the inductor is connected with the output end of the electricity storage module, the second end of the inductor is connected with the anode of the first diode,
the first end of the capacitor is connected with the negative electrode of the first diode, the second end of the capacitor is grounded, and the negative electrode of the first diode and the middle node of the capacitor are connected with the output end of the boosting module.
6. The backup power supply system according to claim 5, wherein the boost module further comprises a protection circuit, an input terminal of the protection circuit is connected with an output terminal of the boost circuit, and an output terminal of the protection circuit is connected with the switch control circuit, for performing overcurrent protection on the boost circuit.
7. The backup power supply system of claim 6, wherein the protection circuit comprises: an operational amplifier and a first resistor, wherein the operational amplifier is connected with the first resistor,
wherein the first resistor is connected between the second path end of the second switch tube and the ground;
and a positive phase input end and a negative phase input end of the operational amplifier are respectively connected with two ends of the first resistor, and an output end of the operational amplifier is connected with the switch control circuit.
8. The backup power supply system of claim 1, further comprising: the feedback circuit comprises a second resistor and a third resistor which are connected between the output end of the boosting module and the ground in series, and a feedback signal is provided by an intermediate node of the second resistor and the third resistor.
9. The backup power supply system of claim 1, further comprising: and the bias circuit is used for obtaining bias voltage according to the working power supply.
10. The backup power supply system according to claim 9, wherein the bias circuit includes a second diode and a fourth resistor, an anode of the second diode is connected to the operating power supply, and a cathode of the second diode is connected to the fourth resistor to obtain the bias voltage.
11. The backup power supply system of claim 10, wherein the bias circuit further comprises:
and the anode of the third diode is connected with the output end of the boosting module, and the cathode of the third diode is connected with the fourth resistor.
12. The backup power supply system according to claim 1, wherein the constant current control unit further comprises: a second comparator and a logic control module,
wherein a positive phase input end of the second comparator receives the voltage at two ends of the electricity storage module, a negative phase input end of the second comparator receives the reference voltage, an output end of the second comparator is connected with the logic control module to provide a comparison result,
the logic control module is used for controlling the on-resistance of the first switching tube according to the received comparison result so as to perform constant-current charging on the electricity storage module.
13. The backup power supply system of claim 1, further comprising: and the standby power supply module is used for supplying power to the power storage module when the working power supply is abnormal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810772411.0A CN110718959B (en) | 2018-07-13 | 2018-07-13 | Standby power supply system |
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| CN201810772411.0A CN110718959B (en) | 2018-07-13 | 2018-07-13 | Standby power supply system |
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| CN110718959B true CN110718959B (en) | 2021-03-05 |
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| CN111857317B (en) * | 2020-07-24 | 2022-07-12 | 苏州浪潮智能科技有限公司 | Voltage pump circuit and method supporting power failure data protection |
| CN114337268B (en) * | 2021-12-30 | 2024-08-02 | 合肥市芯海电子科技有限公司 | Boost circuit, chip and electronic equipment |
| CN114572029B (en) * | 2022-03-09 | 2024-06-21 | 上海瞻芯电子科技有限公司 | Pre-charging device and power supply system |
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| CN202034815U (en) * | 2011-04-15 | 2011-11-09 | 张友专 | Charging device |
| CN103023320A (en) * | 2012-11-23 | 2013-04-03 | 矽力杰半导体技术(杭州)有限公司 | High-efficiency bidirectional direct current converter and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPQ750500A0 (en) * | 2000-05-15 | 2000-06-08 | Energy Storage Systems Pty Ltd | A power supply |
| JP4883313B2 (en) * | 2007-11-28 | 2012-02-22 | トヨタ自動車株式会社 | Power control device |
| CN202150795U (en) * | 2011-07-14 | 2012-02-22 | 深圳市麦思美科技有限公司 | Simulation screen and voltage conversion circuit thereof |
| EP3002398B1 (en) * | 2012-02-22 | 2016-11-30 | Panasonic Intellectual Property Management Co., Ltd. | Backup power source device and automobile equipped with same |
| CN205544244U (en) * | 2016-01-29 | 2016-08-31 | 中国电子科技集团公司第二十三研究所 | Overcurrent protection circuit based on constant current power supply |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202034815U (en) * | 2011-04-15 | 2011-11-09 | 张友专 | Charging device |
| CN103023320A (en) * | 2012-11-23 | 2013-04-03 | 矽力杰半导体技术(杭州)有限公司 | High-efficiency bidirectional direct current converter and control method thereof |
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